A) 3/4
B) 5/4
C) 1/2
D) \[1/\sqrt{2}\]
Correct Answer: A
Solution :
If the same wedge is made rough then time taken by it to come down becomes n times more. The coefficient of friction \[\mu =\left[ 1-\frac{1}{{{n}^{2}}} \right]\tan \theta \Rightarrow \mu =\left[ 1-\frac{1}{{{2}^{2}}} \right]\tan {{45}^{o}}\] \[\mu =\frac{4-1}{4}\Rightarrow \frac{3}{4}\]You need to login to perform this action.
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